Designed for those aiming for the Jersey to polka dots or epic climbs, the Roval Alpinist CLX III are the lightest road wheels ever, weighing only 1,131 g, 134 g less than the previous model. Developed in collaboration with Arris, the new aerodynamic composite spokes are 20 percent stronger than steel ones and save 103.5 grams per wheel system. Try it to believe: Demi climbed the Tourmalet, beating her personal best by 5 seconds. Wheel Size / ETRTO: 622 x 21 (700c). Tubeless Compatibility: Yes. Compatibility with Inserts: Yes. Brake Compatibility: Disc (Centerlock). Rim Construction: Carbon Clincher Hooked. Valve Length: Roval Tubeless Vlave, Alloy 50mm. Number of Holes: Rear: 24H. Rear Rim: Alpinist CLX III Carbon Clincher, 700c (CR2475). Rear Rim Dimensions: Depth: 33mm, External Width (at widest .point): 26.5mm, Internal Width: 21mm, Bead Hook Width: 2.75mm. Rear hub: Roval Low Flange Road Hub, Center Lock, 12x142mm, (LF19-R). Rear Freehub Body: DT Swiss Ratchet EXP (36T ): Sram XD-R. Bearings: DT Sinc Ceramic Bearings - DS:1526 (15 x 26 x 7 mm), NDS: 6802 (15 x 24 x 5 mm). Nipples: Arris MK4 Spoke Nipple Alloy, 6 mm. Rear Spokes: Roval by Arris, Composite Aero Spoke with Ti End Pieces: T-head, 24qty, (DS: 292mm, NDS: 288mm). Rear Lacing Pattern: One-Cross / Three-Cross (2:1), Not Tucked. Tubeless tape width: 25mm. Compatible tires: Tubeless and inner tube. Recommended tire width: 24mm-38mm. Max pressure: Tubeless (110psi) Tubed (130psi), 36mm-38mm: Tubeless (60psi) Tubed (60psi). Weight: 613g (with valves and tape). Assembled by hand. Weight limit: 275 lbs./125 kg. Certification: ISO 5775-2, UCI Approved. Extras: 4 Extra Spokes and Nipples, Roval Wheel Bag, Shimano HG 11/12-Spd. Road Freehub & end Caps (rear wheel only). Color: Black.